Placer-mining machine.



G. A. DBSMOND a; W. T. HENLEY.

PLACER MINING MACHINE.

APPLIOATION FILED MAY a, 1912.

Patented July 8, 1913.

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C. A. DESMOND & W. T. HENLEY.

PLACER MINING MACHINE.

. APPLIGATION FILED MAY 3,1912. 1,067,098, Patented July 8, 1913.

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CLINTON A. DESMOND AND WILLIAM T. I-IENLEY, OF WINNEMUCCA, NEVADA.

PLACER-MINING MACHINE.

Specification of Letters Patent.

Patented July 8, 1913.

Application filed May 3, 1912. Serial No. 694,825.

` companying drawing.

This invention relates to placer mining machines, and has for its objectthe production of an etlicient machine whereby the valuable metals maybe etiiciently extacted from the gravel which is conveyed fro-m miningexcavations in their nnseparated form.

Another object of this invention is the product-ion of an efficientarrangement of cylinders whereby Vthe gravel may be thoroughly cleansedby washing and the difterent metals readily extracted from the refuse orgravel.

With these and other objects in view this invention consists of certainnovel constructions, combinations, and arrangements of parts, as will behereinafter fully described and claimed.

In the drawings :--Figure 1'Y is a top plan view of the mining machine.Fig. 2 is a central longitudinal section thereof. Fig. 3 is a transversesection taken on line 3 3 of Fig. 1, looking in the direction of thearrow. Fig. t is an end elevation of the amalgainating cylinder. Fig. 5is an end elevation of the primary sifting cylinder.

By carefully considering` Fig. 2, it will be seen that the primaryseparating cylinder 1 is supported upon an operating shaft E2 whichshaft has its ends journaled in the transverse beams 3 of the verticalstandards il. The cylinder 1 is preferably of a conical shape consistingof a plurality ot' longitudinally extending slats 5. which are spaced soas to allow the material directed into the cylinder to drop between theslats 5, after being thoroughly washed. The ends of the slats 5 aresupported upon the wheels 6, which wheels are provided with spokes 7 forfacilitating the entrance and discharge of the material to be cleanedinto and from the primary cylinder 1. The shaft 2 is driven by means ofa pulley 8, which is :in turn driven by means of a belt 9 traveling overa drive pulley 10. This pulley 10 is supported by mea-ns of a drivingshaft 11,

and this shaft 11 is driven by means of the main drive pulley 12, whichpulley 12 is in turn drive-n by means of the engine or other inode ofpropulsion through the medium of a belt 13. The main shaft 11 has itsinner end journaled within a transverse brace 14- and the opposite endof the shaft continues through the cylinder 15. rThis cylinder or drinn15 is held stationary between the frame 1G and the central braces ai..The shaft 11 is journaled upon the journal 17, and carries at its outerend a pair of eccentrics 18, for the purpose hereinafter described.Agitating blades 19 are carried by the shaft 11, and are spaced atintervals throughout its length for agitating the material within thecylinder 15, and thereby causing the valuable particles of metal tosettle upon the bottom of said cylinder 15. A shaking riii'le box 20 issupported at the rear end of the cylinder 15 and this rttle boX 2O issupported upon a framework 21. This agitating sifter 20 is carried bymeans of vertically extending rods 21. This ritlle box Q0 is connectedto the arms or rods 21 through the medium of links 22 and in view ofthis fact, it will be seen that the ritlie box 520 may have a lateraloscillatory motion. The eccentrics 18 carry depending, oppositelyextending arms 23 which aruis have their lower ends connected to theopposite sides of the ritlie box 20, and as the shaft 11 is rotated itwill be seen that the ritlie box 2() may be readily actuated by means ofthe central driving shaft 11 in a direct, economical and positivemanner.

An entra-nce chute 24 is carried near the upper end of the outerstandard 4t, and upon this entrance chute 24 is dumped the gravel to bewashed or cleaned from the conveyer 23, said conveyor 25 being made inany desired fashion to accomplish the purpose. The chute 2st directs thematerial (flischarged from the conveyor 25 into the separatii'lgcylinder 1, and as this cylinder 1 rotates the loose material or tinegravel will fall into the washing chute 2G. The larger material willpass out through the discharge end of the cylinder 1 into the maindischarge chute 2T and from there be conveyed to any desired point. Awater supply pipe 28 is connected to the upper end of the chute 2G andto this pipe Q8 is connected a main supply pipe 29. A branch supply pipe8O is connected to the pipe 29, and this pipe enters the upper end ofthe cylinder 15 for discharging water into said cylinder. As the inematerials are discharged into the Washing chute 26 the Water dischargedfrom the pipe 2S will thoroughly Wash the material, and the liquid andmixture of fine substance will be deposited in thercylinder 15 whereuponthe entire mixture Will become agitated through the medium of theagitatingblades-l). A fresh .supply of Water through the pipe 30 Will beadmitted into the cylinder l5 and the heavy metal will drop tov thebottom of the receptacle' l5, and may be cleaned from out of thereceptacle through the clean-out opening 3l. The light metal suchas'light particles of gold will pass out upon the overfimv Water throughthe discharge chute 32 and'be discharged upon the shaking rifle box .20,the liquid running out through the bottom of the sieve. In this mannerit will be seen that all of the light particles of earth or gravel whichmay possiblyT contain any valuable metal will be thoroughly Washed so asto be separable from the valueless gravel, and in this manner vWill bethoroughly supported so as to be conveniently handled. vFurthermore itwill be understood that owing to the thorough Washing of theV gravel,the same will be in good condition Without further `meshing the saineby-hand as the metal will be thoroughly cleansed through the automat-icprocess above described.

Whatis claimed is A stationary cylinder, a rotary shaft extendingthrough and beyond said cylinder and provided Within the cylinder withagitators, eccentrics on the` extended port-ion of the shaft, a rifflebox, pitmen connecting the eccentrics With opposite sides of the riiiebox and adapted to impart a lateral shake to said box, the cylinderbeing provided with an overflow opening delivering to the riliie box,and means for supplying said cylinder With ore and water.

In testimony whereof We hereunto aii'x our signatures in presence oftim-Witnesses.

.CLINTON A. DESMOND. lVILLI-AM T. HENLEY. llitnesses A. M. VILLIAMS, J;A. LIPMAN.

Copies of this patent maybe obtained for five cents each, -bytaddressngthe Commissioner.of'atents, Washington, D. C.

